Bio 223A Exam 2 Part 3 Flashcards
Chapter 8
What is a joint?
Where two bones meet
What is a symphysis?
Two bones joined by fibrocartilage
where do we find the symphysis pubis?
In the pelvis
Where do you find the atlanto-axial joint?
Cervical spine
Joint functional classifications
Synarthrosis, amphiarthrosis, diarthrosis
Synarthrosis joint classification
Does not allow any movement between articulating bones
Amphiarthrosis
Allows only a small amount of movement between articulating bones
Diarthrosis
Freely moveable, allowing a wide variety of specific movements
Joint structural classifications
Fibrous joints, cartilaginous joints, synovial joints
Fibrous joints
Fastened together by den regular collagenous connective tissue without a joint space between articulating bones; can be synarthrosis or amphiarthrosis
Cartilaginous joints
Fastned tougher with cartilage without a joint space; can be synarthrosis or amphiarthrosis
Synovial joints
Diarthrosis joints have layer of hyaline cartilage on articulating surface of each bone joint space is a fluid-filled cavity found between articulating bones
Suture
Immovable joint between edges of bones that make up cranium; fully fused sutures are very stable, well suited for protecting brain
What is gomphosis?
Immovable joint between each tooth and its bony socket in jaw
What is periodontal ligament
Strong fibrous membrane that links tooth firmly to jaw
What is a synostosis joint?
Synarthrotic, totally rigid, immovable joint that forms when bones fuse, bone replaces the cartilaginous connection
Syndesmosis
Joint between tibia, fibula , ulna and radius; bones are joined by an interosseous membrane or ligament composed of dense regular collagenous connective tissue, which allows for small amount of movement
What type of joints are the joints in the appendicular skeleton?
Synovial joints
What is the purpose of synovial fluid?
Lubricates the joint and reduces friction
An example of where brusa is found?
Shoulders
What is the function bursa?
Reduce friction between all moving parts associated with joints
Tendon sheath
Long brusa that surrounds tendons; protects tendons as they slide across joint during movement
Where are epiphyseal plates found?
Ends of long bones, where growth happens
Synchondrosis
Consists of bones linked together by hyaline cartilage
Epiphyseal plates
Composed of hyaline cartilage that connect diaphysis and epiphysis of developing long bones; replaced with bone during maturation
What joints do knees have?
Complex ellipsoid joint
What type of joints are most moveable?
Diarthroses, synovial joints
Joint cavity( Synovial cavity)
Space found between articulating bones
Articular capsule
Double-layered structure, outer fibrous layer keeps articulating bones from being pulled apart and isolates joints from rest of the body, inner layer ( Synovial membrane) lines entire inner surface expect where hyaline cartilage is present
What do the cells in the synovial membrane secrete?
Synovial Fluid